Homework Help: Physics Waves

Posted by Mike on Wednesday, April 21, 2010 at 6:31pm.

Earthquakes are essentially sound waves traveling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse seismic waves. These travel at different speeds. The speed of longitudinal waves, called P waves, is . Transverse waves, called S waves, travel at a slower . A seismograph records the two waves from a distant earthquake.

If the S wave arrives 2.0 min after the P wave, how far away was the earthquake? You can assume that the waves travel in straight lines, although actual seismic waves follow more complex routes.

Physics Waves - Damon, Wednesday, April 21, 2010 at 9:26pm
Vs and Vp were not given?

d = Vs t
d = Vp(t-120 seconds)
so
Vs t = Vp(t-120)
t (Vp-Vs)=120
t = 120/(Vp-Vs)
and
d = Vs t = 120 Vs / (Vp-Vs)
Physics Waves - ., Friday, April 30, 2010 at 2:06am
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physics waves - 1, Saturday, January 21, 2012 at 11:27pm
-1'
physics waves - 1, Saturday, January 21, 2012 at 11:27pm
1
physics waves - -1', Saturday, January 21, 2012 at 11:27pm
1
-1' - 1, Saturday, January 21, 2012 at 11:27pm
1

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